Hau C. Lam

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Kowloon, HK

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Patents Grantslast 30 patents

Information Patent Grant
Keyboard with moveable base plate providing key travel
- Patent number 6,390,699
- Issue date May 21, 2002
- Associate Technology Limited
- Hau Chung Lam
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Folding keyboard
- Patent number 5,457,453
- Issue date Oct 10, 1995
- Wilson L. Chiu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Ionization smoke detector
- Patent number 4,383,253
- Issue date May 10, 1983
- International Quartz Ltd.
- Hau C. Lam
- G08 - SIGNALLING
Information Patent Grant
Door knob alarm device
- Patent number 4,287,513
- Issue date Sep 1, 1981
- International Quartz Ltd.
- Hau C. Lam
- G08 - SIGNALLING
Information Patent Grant
Door opening sensing and alarm producing device
- Patent number 4,258,358
- Issue date Mar 24, 1981
- International Quartz Ltd.
- Thomas K. P. Lee
- G08 - SIGNALLING